Heebelt h



(No Model.)

H. H. GUMBAOK.

. ROTARY PLOW.

No. 320,853. Patented June 23, 1885.

HIHHHHIHHHHI mllllllllllllllliu' M75 W 2% lnvzntmc 1. YW M UNITED STATESPATENT @rrrcn.

HERBELT H. CUMBACK, OF SPRINGFIELD, OHIO, ASSIGNOR TO JOHN A. BLOUNT, OFSAME PLACE.

ROTARY PLOW.

SPECIFICATION forming part of Letters Patent No. 320,853, dated June 23,1885.

Application filed March 5, 1883. Renewed June 1, 18 5 (No model.) 7

bination of devices hereinafter described and claimed, and illustratedin the accompanying drawings, in which Figure 1 represents a plan viewof a rotary plow with my improved steering device attached thereto, andFig. 2 is a partial sec-- tional elevation of the steering device.

It will be observed that I have on the drawings represented the steeringdevice in two positions, one in dotted and the other in full lines. Ihave done this for the purpose of showing its application to differentparts of the machine, although the one shown by full lines wouldprobably be found the most serviceable, inasmuch as it would act withincreased leverage while engaged in obviating the lateral movement ofthe tongue, and thereby lessen the side draft of the machine. lVithplows of this construction it is necessary to locate the rotary cuttersin a line that is oblique to the line of travel of the machine in orderthat the soil may be properly turned and the ground over which themachine passes be properly covered by the several cutters. When thecutters are thus obliquely arranged ,a large amount of side draftresults therefrom, rendering it very difficult to keep the machine inthe desired course of travel; but with my improved steering device thisdifficulty can be entirely overcome.

I do not to wish to confine myself to the particular shape orconstruction of this steering device, as other shapes and constructionswill answeras,- for example, a plain disk or a disk with serrated edges.

The construction of the machine as represented is as follows:

a represents the carrying-wheels; b, the main frame; a, the rotarycutters; d, the

unnecessary. I will therefore confine myself to a the construction ofthe adjustable steering de-' vice. The rotary cutter is journaled in abifurcated arm, 5 by means of a bolt, h. The arm 9 is joined to an arm,i, through the agency of a joint, Z, formed with serrated surfaces oneach of the arms 9 z, in the manner shown in the drawings. Theseserrated surfaces lock together at any point, and permit the arm g to beadjusted to any angle relative to the arm 2' in a vertical direction.They are secured together, when so adjusted, by means of a screw-bolt,m. By this means the arm g may be regulated. to cause the cutter f topenetrate the soil to suit the varying conditions of the machine.

The arm 2' is constructed to slide in acurved slot, at, that is formedin the metallic piece 1), which is securely bolted to the framing of themachine. The end of said arm that moves in said slot is turned up, so asto form a wide guide, q,which tends to keep it steady in the slot, andprevents its movement in a lateral direction after it has been adjusted.To hold the guide q in place, I use a screw bolt, r. By thisconstruction and arrangement of parts an adjustment of the steeringdevice ispossible either in a horizontal or vertical direction, or both,as occasion requires.

I am aware that a steering-wheel has heretofore been connected with therear portion of a rotary plow-frame, so as to be adjusted both laterallyand vertically; also that a cutting steering-wheel has been mounted in aframe attached to a rotary plow-frame and connected with the latter, sothat the wheel can be adjusted laterally; and, further, that a coltcrhas been so connected with a plowbeam as to be adjusted laterally andvertically. Such, therefore, I do not broadly claim; but,

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In a wheeled rotary plow, substantially as set forth, and in combinationwith the frame I In testimony whereof I have hereunto set b b, therotary rudder-disk f, journaled in the my hand this 22d day of February,1883. bifurcated arm 1 havin serrated face to correspond with the armhaving similar face, HERBERT OUMBACK' 5 the bracket ;,having slot n,andthe adj usting- Witnesses: nut r, all adapted and arranged as and forthe HENRY MILLWARD,

purposes set forth.

E. S. WALLACE.

